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jinseopkim0 merged 1 commit into from
Feb 10, 2026
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docs: Add note about Postgres username truncation for IAM auth #4315

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7 changes: 7 additions & 0 deletions docs/src/main/asciidoc/sql.adoc
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Expand Up @@ -159,6 +159,13 @@ You will need to do the following to enable it:
However, it doesn't compromise the security of the communication because the connection is always encrypted.
. Set `spring.datasource.username` to the IAM user or service account created in step 2. Note that IAM user or service account still needs to be https://www.postgresql.org/docs/current/sql-grant.html[granted permissions] before modifying or querying the database.

[NOTE]
====
If you are using a Service Account, you must omit the `.gserviceaccount.com` suffix from the username.
This is due to the name length limit for PostgreSQL usernames.
For example, use `my-sa@my-project.iam` instead of `my-sa@my-project.iam.gserviceaccount.com`.
====

=== Cloud SQL Configuration Properties

|===
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